﻿/*
 *   _____                                ______
 *  /_   /  ____  ____  ____  _________  / __/ /_
 *    / /  / __ \/ __ \/ __ \/ ___/ __ \/ /_/ __/
 *   / /__/ /_/ / / / / /_/ /\_ \/ /_/ / __/ /_
 *  /____/\____/_/ /_/\__  /____/\____/_/  \__/
 *                   /____/
 *
 * Authors:
 *   钟峰(Popeye Zhong) <zongsoft@gmail.com>
 *
 * Copyright (C) 2010-2020 Zongsoft Studio <http://www.zongsoft.com>
 *
 * This file is part of Zongsoft.Reporting library.
 *
 * The Zongsoft.Reporting is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3.0 of the License,
 * or (at your option) any later version.
 *
 * The Zongsoft.Reporting is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Zongsoft.Reporting library. If not, see <http://www.gnu.org/licenses/>.
 */

using System;

using Zongsoft.Data;
using Zongsoft.Services;

namespace Zongsoft.Reporting
{
	[Service(typeof(IReportDataLoader))]
	public class ReportDataLoader : IReportDataLoader
	{
		private IServiceProvider _serviceProvider;

		#region 构造函数
		//public ReportDataLoader(IDataAccess dataAccess)
		//{
		//	this.DataAccess = dataAccess ?? throw new ArgumentNullException(nameof(dataAccess));
		//}

		//public ReportDataLoader(IDataService dataService)
		//{
		//	this.DataService = dataService ?? throw new ArgumentNullException(nameof(dataService));
		//}

		public ReportDataLoader(IServiceProvider serviceProvider)
		{
			_serviceProvider = serviceProvider ?? throw new ArgumentNullException(nameof(serviceProvider));
		}
		#endregion

		#region 公共属性
		public IDataAccess DataAccess { get; }
		public IDataService DataService { get; }
		#endregion

		#region 数据加载
		public object Load(IReport report, IReportDataModel model)
		{
			if(_serviceProvider.Resolve(model.Name) is not IDataService service)
				return null;

			return service.Select(null, model.Schema, Paging.Page(1));
		}
		#endregion
	}
}
